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To Create Prime image for Akai force you can follow this procedure. It's working on release 2.1.2.
Go to Engine Prime Download and get firmware 2.1.2 :
https://enginedj.com/downloads
By using Thekikgen method you have to extract the rootfs image from firmware : https://github.com/TheKikGen/MPC-LiveXplore/wiki/How-to-extract-the-2.6-rootfs-img-from-the-update.img
With Hex Editor ,( i'am using HXD) , search for Hex Value : FD 37 7A 58 5A
It will give you something like this :
Then :
Go to position 2B94 and remove everything upper the string :
Then save the file and quit Hex Editor. Next go to file folder where you saved the .img. With 7zip, click the file and choose Extract Here :
The will extract the Filesystem image which is approx 512 mb.
You can copy this new file ( 512 mb ) on your SD card.
Then we are gogin to a create filesystem overlay which will contain our files. On you media card location ( eg : /media/02EB-7AEF/ ) use the following command to create a new filesystem file.
dd if=/dev/zero of=lower-fs.img bs=4096 count=204800
It will create a file which size is 800 mb. to give Ext4 FS type to our file, issue this comand :
mkfs -t ext4 lower-fs.img
Create a folder named overlay on your media card ( eg : /media/02EB-7AEF/overlay).
mkdir /media/02EB-7AEF/overlay
Mount the created filesystem file ( lower-fs.img) on overlay folder :
mount lower-fs.img overlay
Go to your overlay folder :
cd overlay
And create the following folder :
mkdir overlayupper mkdir overlaywork ls => lost+found overlayupper overlaywork
Then we have to populate our overlayupper folder with the content of the denon firmware. You can view the 512 Mb file from denon with 7zip, and extract / transfert files. Another way is to mount the 512Mb file in another folder, and to copy files from there. That's i will do. I put the 512Mb file in a folder named SC5 on my media card :
# pwd /media/02EB-7AEF/SC5 # ls -al 4 total 512256 drwxr-xr-x 2 root root 131072 Mar 24 14:45 . drwxr-xr-x 60 root root 131072 Mar 24 14:36 .. -rwxr-xr-x 1 root root 524288000 Mar 24 13:53 PRIMEGO-2.1.2-Update # mkdir /media/02EB-7AEF/PRIMEGOIMGFILE # mount PRIMEGO-2.1.2-Update /media/02EB-7AEF/PRIMEGOIMGFILE # cd /media/02EB-7AEF/PRIMEGOIMGFILE # ls bin dev home lib32 lost+found mnt proc run srv tmp var boot etc lib linuxrc media opt root sbin sys usr # cd usr # ls Engine bin lib libexec qt share SoundSwitch etc lib32 mkspecs sbin
copy files :
# cp -a Engine/ /media/02EB-7AEF/overlay/overlayupper/ # cp -a SoundSwitch/ /media/02EB-7AEF/overlay/overlayupper/ # cp -a qt /media/02EB-7AEF/overlay/overlayupper/
Some extra/new libs are required :
# cp -a lib/libboost* /media/02EB-7AEF/overlay/overlayupper/lib/ # cp -a lib/libicu* /media/02EB-7AEF/overlay/overlayupper/lib/
All this files are put in the lower-fs.img file.
Then we will use the magical trick of the overlay to map what we have in overlayupper on /usr : to do that i do :
mount -t overlay -o rw,relatime,lowerdir=/usr,upperdir=/media/02EB-7AEF/overlay/overlayupper,workdir=/med ia/02EB-7AEF/overlay/overlaywork overlay /usr
And when you go to /usr , Taddaaaa! you have your content :
# cd /usr # ls Engine SoundSwitch bin etc lib lib32 libexec qt sbin share
Once done, before running Engine you have to EXPORT some var :
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/qt/lib export AIR_SCREEN_ROTATION=-90
And to spoof product-code, you have to bind a file with new product code. to do this do a copy of the real file :
Then edit the file :
vi "/media/02EB-7AEF/inmusic,product-code"
